What is the role of functional assays in the role of the workup of protein C deficiency?

Updated: Jan 04, 2019
  • Author: Shamudheen Rafiyath, MD; Chief Editor: Perumal Thiagarajan, MD  more...
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Functional protein C assays make use of the venom of the southern copperhead snake (Agkistrodon contortrix), which activates the protein C zymogen to produce activated protein C (aPC). [65]  aPC activity can then be measured by means of a clotting assay or a chromogenic substrate. The adult reference range for protein C activity tends to be slightly lower than the immunologic normal range.

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